The SPEEDI-BOOT 6 in. W x 10 in. L x 8 in. D 45° Register Vent Boot with Adjustable Hangers is designed for remodeling, new construction, do-it-yourself and professional HVAC projects. This register vent boot has a galvanized steel frame for durability and telescoping hanger arms for easy installation. The register vent boot has a dust and debris cover to help prevent contaminants from entering the HVAC system and a maximum temperature rating of 600°F to suit your needs.